The phrase "major illness" means a serious and significant sickness or disease. It refers to a health condition that is severe and can have a big impact on a person's life. Full definition
A single lump sum payment is made to the insured in a lifetime regardless of the number of major illness suffered by him. (policybazaar.com)
You can either select the comprehensive cover (34 illnesses) or major illnesses cover (15 illnesses) or heart and cancer cover (9 illnesses) at the inception of the policy. (bharti-axalife.com)
It pays a lump sum benefit in case you are diagnosed with major illness like cancer, heart attack, paralysis, kidney failure, coma etc.. (policybazaar.com)